Having a cavity doesn't have to mean having a mouth full of metal. Composite resin maybe the material of choice. Not only can we fill new cavities with white fillings but we can also replace your old metal filling with the more attractive white filling.
Composite resins are what most people think of when they talk about "white filling". These materials are improving at such a rapid rate that they can be placed in most teeth with the same confidence as silver Amalgam

Advantages
1. The preparation is more conservative as well/making minimally invasive
2. appropriate for small to medium sized of restoration
3. Esthetics
4. Immediate result
5. Less Expensive than Inlay/Onlay ( ceramic filling)

Disadvantages
1. The bonded area of teeth can chip and stain over time
2. It may not be strong enough for large sized of restoration [when these problem occure the next choice would be Inlay/Onlay or crown

The Procedure

1. The tooth structure is cleaned and etched.
2. The adhesive is applied to the area needing bonding.
3. Once applied,a tooth colored bonding material is placed on the tooth.It is permanently hardened and fuse to the tooth with a hand held white light gun.This process is called Photo